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| author | James Morse <james.morse@arm.com> | 2020-02-21 16:21:05 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-21 09:06:44 +0200 |
| commit | b3383bb299e7d6e71879123c60f83cf5c97942da (patch) | |
| tree | 4d5a696490c49f6b643a77e5accdf2d263e84856 /tools/perf/scripts/python/stackcollapse.py | |
| parent | ac793882668c9685ff4b34d8fde39b0a182f1642 (diff) | |
| download | kernel-b3383bb299e7d6e71879123c60f83cf5c97942da.tar.gz | |
x86/resctrl: Preserve CDP enable over CPU hotplug
commit 9fe0450785abbc04b0ed5d3cf61fcdb8ab656b4b upstream.
Resctrl assumes that all CPUs are online when the filesystem is mounted,
and that CPUs remember their CDP-enabled state over CPU hotplug.
This goes wrong when resctrl's CDP-enabled state changes while all the
CPUs in a domain are offline.
When a domain comes online, enable (or disable!) CDP to match resctrl's
current setting.
Fixes: 5ff193fbde20 ("x86/intel_rdt: Add basic resctrl filesystem support")
Suggested-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20200221162105.154163-1-james.morse@arm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions